A falling air con unit, broken lights and no backstage toilets: Behind the chaos at massive £365m 'Co-Flop' arena - as builders say they warned bosses it is still 'nowhere near ready' but 'it's all about the money'

Costing £365million, it is the most expensive and largest purpose-built concert venue in Britain and the jewel in the crown for an American-based firm that owns 300 venues around the world.